Can someone care to explain the diagram i.e. drawn by hand in the Vents.pdf. I need to know what to look for etc etc. It will be good knowledge for everyone.

In drawing both look almost similar, I will trying to find a real picture to show how it is actually look different.

I think the original drawing by Raymond Hiew not like that one leh.

I also could not find the original drawing by Raymond. If my memory serve me right, here is how a female and male vent shape should look like, according to Raymond Hiew and Felix.



To be frank, I am more confused and unsure about sexing after that day. As I said earlier, the more I know, the more I do not know.. hehe.

Sun and umbrella? :O

:-))

Needs a fair maiden underneath!! :-D

I am more confused now ..... Hahahahahha.... Will ask Raymond to draw again then post it up !

Bros & Sis.

I think we can learn a lot if we can share vent pictures of our known male and female. It will even be better if we can share progress pictures of our koi vent (tosai -> nisai -> sex confirmation).

Since I do not have time to take vent pictures of my koi yet, I would like to post here some of the vent pictures I have taken from Koi-Bito and Koiquest for our discussion and learning purposes. What vent characteristic make you think they are male or female? As we go along, hopefully we can confirm the attached vent characteristic list:

Male - elongated or triangular in shape, sunken and concave,

Female - more round in shape, protrude and convex, a more prominent and long transverse ‘slit’ running across, blush of red color around its perimeter

1. Vent 1 (Confirmed female)
Reason for female?? : more round in shape and a more prominent and long transverse ‘slit’ running across (shown by the red arrow)



2. Vent 2 (Confirmed male)
Reason for male?? : elongated in shape, sunken and concave



3. Vent 3 (Confirmed male since got milt)
Reason for male?? : Triangular in shape?? Most people would have sex this koi as female since the vent is a bit protruding and red (I suppose he was heavily fed)

Sun and umbrella!! :-D
Since I am still not home, i think it will much better if you guys can upload photos of a few CONFIRMED male and female. The more the better for comparison consistency. Looking at the vent alone is very confusing.

On more thing I realize, for the same size kois, beside the smooth pactoral fins, the female pactoral fin's base is thicker. Thick and smooth base is what we are looking for. However some male will show obvious thickness at the leading egde of the pactoral fins. This is my observation. Rough fin in the middle or end of pactoral fins don't count. The roughness on the cheek will be good indication of male koi as he is "gatal" or ich
and ready for spawning.

Another theory which I dare not confirm is that to monitor the shape if the body right after the gill plate. So far, it has given me good result in term of probability. Regardless of good body male at tossai, the body tends to curve inward or straight. After that, it can either become bulkier(for bulky male) or straight or slimmer for not so good body.

In female however, regardless of how long the body is( but not for really underfed female), it will curve outward just after the gill plate. Then only it either curve in or straight or even outward if the body is bulky. I hope I don't make you guys more confuse with this theory :-D Just my personal observation.